For this question, the Data Booklet may be used. The isotope $^{99}\text{Tc}$ is radioactive and has been detected in lobsters and seaweed near nuclear fuel reprocessing plants. Which of the following statements about an atom of $^{99}\text{Tc}$ are correct?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only